Stainless steel ball valve details

Stainless steel ball valve, English name: ball valve.

Stainless steel ball valve is one of the most common stainless steel valves.

Stainless steel ball valve development and working principle:

The stainless steel ball valve only needs to be rotated tightly with a 90 degree rotation and a small torque. The completely equal valve body cavity provides a small, straight flow path for the medium. Stainless steel ball valves are generally considered to be most suitable for direct opening and closing. However, recent developments have designed the stainless steel ball valve so that it has a throttling and control flow rate. Stainless steel ball valve's main features are its compact structure, easy operation and maintenance, suitable for general working media such as water, solvent, acid and natural gas, but also for working medium with poor working conditions such as oxygen peroxide, methane and ethylene. Stainless steel ball valve body can be integral or modular.

Stainless steel ball valve working principle and role:

The working principle of the stainless steel ball valve is to make the valve open or blocked by rotating the valve. Stainless steel ball valve switch is light, small size, can be made of a large diameter, reliable sealing, simple structure, easy maintenance, sealing surface and spherical surface often in the closed state, not easily eroded by the media, widely used in various industries.

Stainless steel ball valve is mainly used in the pipeline to cut, distribute and change the flow direction of the medium. Ball valve is a new valve that has been widely used in recent years. It has the following advantages:

1. The fluid resistance is small, and its drag coefficient is equal to the length of the same length.

2. Simple structure, small size, light weight.

3. It is tight and reliable. At present, the sealing surface material of stainless steel ball valve is widely used in plastic and has good sealing performance. It has also been widely used in vacuum systems.

4. Easy to operate, fast opening and closing, as long as the rotation from 90 degrees from full open to fully closed, easy remote control.

5. Easy maintenance, stainless steel ball valve structure is simple, the seal ring is generally active, removal and replacement are more convenient.

6. When fully open or fully closed, the sealing surfaces of the ball body and the valve seat are isolated from the medium. When the medium passes through, the sealing surface of the valve will not be eroded.

7. Wide range of applications, from small to several millimeters in diameter, up to a few meters in size, from high vacuum to high pressure can be applied.

Stainless steel ball valve has been widely used in petroleum, chemical, power generation, paper, atomic energy, aviation, rockets and other sectors, as well as people's daily lives.

Stainless steel ball valve can be divided according to the structure:

First, stainless steel float ball valve stainless steel ball valve is floating, under the pressure of the media, the ball can produce a certain displacement and pressed on the outlet side of the sealing surface, to ensure that the outlet seal.

Stainless steel floating ball valve has a simple structure and good sealing performance. However, the load of the ball bearing the working medium is transmitted to the outlet sealing ring. Therefore, it is necessary to consider whether the sealing ring material can withstand the working load of the ball medium. This structure is widely used in the low-pressure stainless steel ball valve.

Second, stainless steel fixed ball valve stainless steel ball valve is fixed, no movement after pressure. Stainless steel fixed ball valve has a floating valve seat. After being under pressure from the medium, the valve seat moves and the sealing ring is pressed against the ball to ensure sealing. Bearings are usually mounted on the upper and lower shafts of the ball, and the operating torque is small, suitable for high pressure and large diameter valves.

Third, stainless steel ball valve stainless steel ball ball is elastic. The ball body and the valve seat seal ring are made of metal materials, and the specific pressure of the seal is large. The pressure of the medium itself cannot meet the requirements of the seal, and external force must be applied. This valve is suitable for high temperature and high pressure media.

Stainless steel elastic ball is to open a flexible groove at the lower end of the inner wall of the ball to obtain elasticity. When closing the channel, use the wedge head of the valve stem to make the ball expand and seal with the valve seat. Loosen the wedge head before turning the ball, the ball will return to its original shape, so that there is a small gap between the ball and the valve seat, which can reduce the friction and operating torque of the sealing surface.

Stainless steel ball valve according to its position can be divided into straight-through, three-style and right-angle. The latter two stainless steel ball valves are used to distribute media and change the direction of the media.